JP2009077966A - Drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drier capable of supplying drying air from the rear wall side of a drum into the drum so as to effectively apply the drying air to laundry in the drum. <P>SOLUTION: Recesses 39 and projections 38 are provided on the front surface, which faces inside the drum 8, of a cover 30 mounted to the drum rear wall 18. Thereby, a space 53 is secured between the cover 30 and the laundry 52 so as to prevent small holes 36 in the cover 30 from being closed by the laundry 52 and to smoothly supply the drying air passing through a receiving port 33 of the drum rear wall 18 and the small holes 36 into the drum 8 through the space 53. As a result, the drying air is effectively applied to the laundry 52 inside the drum 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dryer that dries laundry with drying air.

Dryers for drying laundry are known. A washing machine having a laundry drying function is also known (see, for example, Patent Document 1). In the washing machine described in Patent Document 1, a cylindrical rotating drum that accommodates laundry is rotatably disposed in a water receiving tub (corresponding to an outer tub). The rear wall of the rotating drum is disposed on the back side of the water receiving tank. A large number of water passage holes are provided in the outer peripheral portion of the rotating drum, and the inside of the rotating drum and the water receiving tank communicate with each other through these water passage holes.
Japanese Patent Laying-Open No. 2005-143531

  In the washing machine described in Patent Document 1, a warm air blowing port is provided below the back surface of the water receiving tub, and warm air for drying the laundry (sometimes referred to as drying air) is warm. It flows into the water receiving tank from the wind blowing port. The reason why the warm air blowing port is provided below the back surface of the water receiving tank is that the warm air has a property of moving upward, and the drying efficiency is increased by flowing into the water receiving tank from below (Patent Document). 1 paragraph [0009]).

However, in the configuration of Patent Document 1, it is difficult to say that the warm air that has flowed into the water receiving tub is further satisfactorily supplied to the inner rotating drum, and drying air is effectively applied to the laundry in the rotating drum. It ’s not the case.
The present invention has been made based on such a background, and is a drier that can supply dry air into the drum from the rear wall side of the drum, and can effectively apply the dry air to the laundry in the drum. The main purpose is to provide

Another object of the present invention is to provide a dryer capable of preventing the laundry from being damaged during drying.
Another object of the present invention is to provide a dryer that can suppress the increase in size and facilitate the design.

  The invention according to claim 1 is disposed in the outer tub and in the outer tub so as to be rotatable about a rotating shaft extending obliquely upward toward the front, and a central portion is coupled to the rotating shaft in a direction orthogonal to the rotating tub. A drum rear wall having a circular drum and a drum peripheral wall extending forward from the periphery of the drum rear wall, the drum for storing laundry, an intake opening formed in the drum rear wall, and the drum rear wall A disk-shaped cover formed with a plurality of small holes through which air flowing into the drum from the intake opening is passed, the surface facing the drum being centered on the rotating shaft A ring-shaped concave portion and a convex portion that are alternately provided along a radial direction about the rotation axis, and a dry air supply for supplying the dry air into the drum through the intake opening Including a device, It is 燥機.

In the invention according to claim 2, the cover covers the intake opening from the inside of the drum, the center bulges inward of the drum, and the periphery is formed close to the rear wall of the drum, The dryer according to claim 1, wherein a rib that protrudes toward the intake opening is provided on a surface facing the intake opening.
A third aspect of the present invention is the dryer according to the second aspect, wherein the ribs traverse the intake openings radially from the center outward.

According to a fourth aspect of the present invention, there is provided a rear wall of the outer tub facing the rear wall of the drum for taking the dry air into the outer tub at a position shifted outward from the intake opening. The dryer according to any one of claims 1 to 3, wherein an intake port is formed.
According to a fifth aspect of the present invention, a driving device for rotating the drum via the rotating shaft is provided on the rear surface of the rear wall of the outer tub and closer to the center than the intake port. The dryer according to claim 4, wherein

According to the first aspect of the present invention, in this dryer, the dry air from the dry air supply device is supplied into the drum through the intake opening on the rear wall of the drum and the small hole in the cover.
Here, since the rotating shaft of the drum extends obliquely upward toward the front, the laundry accommodated in the drum always comes into contact with the cover on the drum rear wall side by its own weight. However, since a concave portion and a convex portion are provided on the surface of the cover that faces the drum, a gap can be secured between the cover and the laundry. As a result, the small holes in the cover are prevented from being blocked by the laundry, and the dry air that has passed through the small holes can be smoothly supplied into the drum from the gap described above. Dry air can be bathed effectively.

Further, the concave and convex portions described above are ring-shaped around the rotation axis. Therefore, even if the cover rotates together with the drum, the convex portion smoothly contacts the laundry, so that the laundry can be prevented from being damaged.
Moreover, the strength of the cover can be improved by providing these concave and convex portions alternately along the radial direction around the rotation axis.

According to the second aspect of the present invention, since the center of the cover bulges inward of the drum, the connecting portion between the drum rear wall and the rotating shaft can be disposed at the center. On the other hand, since the periphery of the cover is formed so as to be close to the rear wall of the drum, a relatively large space for storing laundry can be secured in the drum even if the center bulges into the drum. .
In addition, since a rib that protrudes toward the intake opening is provided on the surface of the cover that faces the intake opening, the rib can regulate the flow of dry air from the intake opening into the drum. it can.

According to the third aspect of the present invention, the rib crosses the intake opening radially from the center to the outside, so that it is possible to directly adjust the flow of the drying air from the intake opening into the drum. .
According to the fourth aspect of the present invention, the rear wall of the outer tub facing the rear wall of the drum has the intake port for taking the dry air into the outer tub at a position shifted outward from the intake opening. Is formed. Therefore, by letting the dry air flow from the intake port to the intake opening, the dry air can be supplied into the drum so as to go to the rotating shaft of the drum. Thereby, in the drum, the drying air can be uniformly applied to the laundry from the rotating shaft side.

  According to invention of Claim 5, it is a back surface of the rear surface wall of an outer tank, Comprising: The drive device is provided in the center side rather than the intake port. As a result, the drive device can be removed from the flow path of the dry air from the dry air supply device to the intake port, so the size of the dryer around the back of the rear wall of the outer tub is suppressed and the design is simplified. Can be achieved.

Below, the washing dryer 1 as a dryer which concerns on one Embodiment of this invention is demonstrated in detail with reference to an accompanying drawing. In addition, in this embodiment, although the washing-drying machine 1 which has not only a drying function but a washing function is illustrated, this invention is applied also to the drying machine which has only a drying function.
FIG. 1 is a perspective view of the washing / drying machine 1 as seen from the front upper right side, and shows a state where a part of the decorative panel forming the outer shell is removed. FIG. 2 is a perspective view of the washing / drying machine 1 from which the decorative panel has been partially removed as viewed from the upper left side of the back surface. FIG. 3 is a right sectional view of the washing / drying machine 1 from which a part of the decorative panel is removed. FIG. 4 is a view showing a section around the rear upper end of the washing tub 3 in the washing / drying machine 1 in order to explain how the drying air flows from the air passage 5 into the drum 8. In addition, when referring to the direction, the illustrated direction arrow is referred to (the same applies to other drawings). Here, the front side and the front side are the same, and the rear side, the back side, and the back side are the same.
<Washing machine overall configuration>
Referring to FIG. 1, a washing / drying machine 1 is formed in a substantially box shape by a decorative panel that forms an outer shell, and on the inside, a frame 2, a washing tub 3, a control board 4, an air passage 5, and a heat pump. A device 6 is arranged. The air path 5 and the heat pump device 6 function as a dry air path supply device.
(1) Frame and Control Board The frame 2 forms the bottom wall (lower wall) of the washing / drying machine 1. The washing tub 3, the control board 4, the air path 5, and the heat pump device 6 are attached to the frame 2 from above. The control board 4 is disposed on the front side of the frame 2 and is electrically connected to electrical components in the washing / drying machine 1. When a user operates an operation panel (not shown) provided in the washing / drying machine 1, an electric signal is output from the control board 4 to the electric components in the washing / drying machine 1. The desired operation is performed.
(2) Washing tub As shown in FIG. 3, the washing tub 3 includes an outer tub 7 and an inner tub (drum 8) that is rotatably disposed in the outer tub 7 and stores laundry. Yes.

  The outer tub 7 is attached to the frame 2 by a plurality of dampers (not shown), and is supported by the frame 2 so as to be swingable. The outer tub 7 has a hollow and substantially cylindrical shape, and is arranged such that its central axis is inclined upward (for example, 15 ° with respect to the horizontal plane) toward the front side. The outer tub 7 has a disc-shaped rear wall (refer to FIG. 2, referred to as an outer tub rear wall 9 as a rear wall of the outer tub 7) on the back side in the central axis direction. The circumferential wall of the outer tub 7 is referred to as an outer tub circumferential wall 10. An opening (see FIG. 1, referred to as an outer tank opening 11) is formed on the front surface of the outer tank 7. In the outer tub 7, a substantially cylindrical space similar to the outer shape of the outer tub 7 is formed by the outer tub rear wall 9 and the outer tub peripheral wall 10.

  As shown in FIG. 2, a motor 12 as a driving device is attached to the back surface of the outer tank rear wall 9. The motor 12 is attached to the outer tank rear wall 9 so that the circle center of the cylindrical motor casing 13 forming the outer shell thereof coincides with the circle center of the outer tank rear wall 9. As shown in FIG. 3, the output shaft of the motor 12 (referred to as a motor shaft 14 as a rotating shaft) projects obliquely upward toward the front through the circle center of the motor casing 13, and its front end (shaft The front end portion 15) penetrates the outer tank rear wall 9 at the center of the circle and is exposed in the outer tank 7. Further, a bearing case 16 containing a bearing 17 is interposed between the motor casing 13 and the outer tank rear wall 9, and the motor shaft 14 is rotatably supported by the bearing 17 of the bearing case 16. .

  As shown in FIG. 4, a through hole (referred to as an inlet 27 as an intake port) is formed in the outer tank rear wall 9 above the center of the circle (specifically, in the radial direction outside of the motor 12). . In other words, the motor 12 is provided closer to the center of the circle than the entrance 27. Further, in the bearing case 16, a hole (referred to as a case hole 50) that penetrates the bearing case 16 substantially in the front-rear direction is formed slightly above the position facing the inlet 27 from the rear side. The case hole 50 and the inlet 27 communicate with each other through a flow path 51 extending radially inward (circular center side of the outer tank rear wall 9) from the rear side toward the front side.

Further, as shown in FIG. 1, a through hole (referred to as an outlet 24) is formed in the front upper end portion of the outer peripheral wall 10.
As shown in FIG. 3, the drum 8 has a hollow, substantially cylindrical shape similar to the internal space of the outer tub 7. As with the outer tub 7, the drum 8 is arranged such that its central axis 21 is inclined upward toward the front side. That is, in the washer / dryer 1, a so-called oblique drum structure is employed. The drum 8 has a disk-shaped rear wall (referred to as a drum rear wall 18) on the back side in the central axis direction. The circumferential wall of the drum 8 is referred to as a drum circumferential wall 19. The drum peripheral wall 19 extends forward from the outer peripheral edge of the drum rear wall 18 along the central axis 21.

  The drum peripheral wall 19 has a large number of through holes 22, and through these through holes 22, the internal space of the drum 8 and the space between the drum 8 and the outer tub 7 are mutually connected. Communicate. Further, a plurality of baffles 23 projecting toward the circular center side of the drum peripheral wall 19 (that is, the central shaft 21 side) are provided on the inner peripheral surface of the drum peripheral wall 19 at equal intervals in the circumferential direction.

  An opening (see FIG. 1, referred to as drum opening 20) is formed on the front surface of the drum 8. In a state where the drum 8 is housed in the outer tub 7, the rear side surface of the drum rear wall 18 is opposed to the front side surface of the outer tub rear wall 9 with a predetermined distance, and the outer peripheral surface of the drum peripheral wall 19 is It faces the inner peripheral surface of the outer peripheral wall 10 with a predetermined distance. The drum opening 20 faces the outer tank opening 11 from the rear side, and these openings communicate with each other. The shaft front end 15 of the motor shaft 14 described above is connected to the circular center portion 31 of the drum rear wall 18. In this state, the drum rear wall 18 is orthogonal to the motor shaft 14, and the center axis 21 of the drum 8 coincides with the motor shaft 14. Here, when the motor 12 is driven and the motor shaft 14 rotates, the driving force of the motor 12 is transmitted to the drum 8 through the motor shaft 14, and the drum 8 rotates around the motor shaft 14 in the outer tub 7. .

When washing is performed by the washing / drying machine 1, first, the laundry is accommodated in the drum 8 through the outer tub opening 11 and the drum opening 20. Then, when the detergent-dissolved water (referred to as washing water) is accumulated in the outer tub 7, the washing water soaks into the laundry in the drum 8 through the through hole 22 described above, and the laundry stains. Decomposed and removed by water detergent components. At this time, since the drum 8 is rotated, the laundry in the drum 8 is stirred by the baffle 23 and so-called tapping is performed. After washing water is discharged from the washing tub 3 (outer tub 7 and drum 8) to the outside of the machine, the laundry is rinsed following the washing. Further, after washing and rinsing, the drum 8 is rotated at a high speed, and the laundry is dehydrated. The water rinsed out of the laundry and the water squeezed out of the laundry by dehydration are discharged from the washing tub 3 to the outside of the machine.
(3) Air path and heat pump device In the washing tub 3, in addition to washing, rinsing and dehydration, the laundry can also be dried. Therefore, as shown in FIG. 2, the above-described air path 5 is connected to the outer tub 7.

  The air path 5 is bent along the outer surface of the outer tub 7 in order to reduce the size of the washing / drying machine 1. In the middle of the air path 5, the heat pump device 6 described above is provided. Here, the heat pump device 6 is supported by the frame 2 on the rear side of the washing tub 3. In the following, when viewed in the flow direction of the air flowing through the air passage 5 (see the broken arrows in the figure), a portion upstream of the heat pump device 6 in the air passage 5 is referred to as an upstream air passage 25 and is downstream of the heat pump device 6. The portion is defined as a downstream side air passage 26.

  The upstream side air passage 25 extends upward along the outer tank rear wall 9 from the right end side of the heat pump device 6, and then bends and extends forward along the outer tank peripheral wall 10, and the outlet 24 ( (See FIG. 1). The downstream side air passage 26 extends upward from the left end side of the heat pump device 6 along the outer tank rear wall 9, then bends, and subsequently extends to the right along the outer tank rear wall 9. 50 and communicates with the inlet 27 of the outer wall 9 through the case hole 50 (see FIG. 4). A blower 28 is provided in the middle of the downstream air passage 26 (specifically, near the heat pump device 6).

When the blower 28 is driven at the time of drying, moist air in the washing tub 3 is sucked out into the upstream air passage 25 from the outlet 24 (see FIG. 1) (see broken arrow in the drawing). This air is guided to the heat pump device 6 by the upstream air passage 25.
In the heat pump device 6, a refrigerant circuit, a cooling unit, a compressor, a heat radiating unit, and a throttle means (all not shown) are provided. In the refrigerant circuit, the refrigerant circulates, the compressor compresses the circulated refrigerant, and the throttle means reduces the pressure of the compressed refrigerant. The cooling part and the heat radiating part are both fin-shaped and exposed in the air passage 5. In the cooling part, the decompressed refrigerant passes, and in the heat radiating part, the compressed refrigerant passes.

  The air guided to the heat pump device 6 sequentially passes through the cooling unit and the heat dissipation unit. Here, when the air passes through the cooling unit, heat is absorbed by the decompressed refrigerant and is dehumidified. And the dehumidified air is heated by the heat radiated from the compressed refrigerant when passing through the heat radiating section. Air thus dehumidified and heated (referred to as dry air) is discharged to the blower 28, thereby flowing in the downstream air passage 26 toward the case hole 50, and from the case hole 50 and the inlet 27 to the washing tub. (Refer to the broken arrow in the figure). The laundry housed in the washing tub 3 (drum 8) is dried by the drying air. Thus, at the time of drying, air circulates between the washing tub 3 and the air passage 5, and the drying air is supplied into the drum 8 by the air passage 5 and the heat pump device 6.

Here, as described above, the motor 12 is provided in the outer tank rear wall 9 closer to the center of the circle than the inlet 27. Therefore, since the motor 12 can be removed from the air passage 5 that is a flow passage of the dry air toward the inlet 27, the washing dryer 1 is increased in size around the outer surface of the rear wall 9 of the outer tub 7 (specifically, the depth) The increase in size) can be suppressed, and the design can be facilitated.
<Drum>
Hereinafter, the drum 8 will be described in detail. 5A is a right side sectional view of the drum 8, FIG. 5B is a rear view of the drum rear wall 18, FIG. 5C is a front view of the drum rear wall 18, and FIG. 5D is a drum according to a modification. 3 is a rear view of the rear wall 18. FIG. 6A is a front view of the cover 30, FIG. 6B is a cross-sectional view based on the line AA in FIG. 6A, and FIG. 6C is a rear perspective view of the cover 30.

5A, on the drum rear wall 18, the circular center portion 31 has a circular center portion 31 so that the front end portion 15 (see FIG. 3) of the motor shaft 14 of the motor 12 can be received. Compared to the surrounding portion (referred to as the surrounding portion 32), the portion bulges forward. The front side surface of the peripheral portion 32 is formed flat.
As shown in FIG. 5B, three through holes (referred to as receiving ports 33 as intake openings) are formed in the peripheral portion 32 at equal intervals in the circumferential direction. Note that six receiving ports 33 may be formed as shown in FIG. 5D. The number of the receiving ports 33 is set as appropriate.

As shown in FIGS. 5A and 5B, the back surface of the peripheral portion 32 forms a ring shape concentric with the drum rear wall 18 and is referred to as a plurality of (for example, four) protrusions (for example, four drum protrusions 34) protruding rearward. ) Are provided at equal intervals in the radial direction. These drum protrusions 34 surround all the receiving ports 33 from the outside in the radial direction.
As shown in FIGS. 5A and 5C, a cover 30 is attached to the front side surface of the drum rear wall 18. The cover 30 has a disk shape that can cover all the receiving ports 33 from the front side (the inside of the drum 8).

Specifically, as shown in FIG. 6A, a through hole (referred to as a screw hole 35) is formed at the circle center 29 of the cover 30. The cover 30 is formed with a number of through holes (referred to as small holes 36) different from the screw holes 35 so as to surround the screw holes 35 with a distance from the outside in the radial direction.
As shown in FIG. 6B, the front side surface of the cover 30 is formed so as to rise from the outer peripheral edge 37 toward the circle center 29 toward the front side. Specifically, on the front side surface of the cover 30, a plurality of (for example, three) convex portions 38 that are ring-shaped around the circle center 29 and project to the front side from the outer peripheral edge 37 toward the circle center 29, It is formed at intervals in the radial direction. Here, the convex portion 38 on the circular center 29 side protrudes forward from the convex portion 38 on the outer peripheral edge 37 side. Therefore, on the front side surface of the cover 30, a concave portion 39 is formed between the convex portions 38 that are adjacent in the radial direction. In this embodiment, two concave portions 39 are formed corresponding to the three convex portions 38 formed as described above. That is, convex portions 38 and concave portions 39 are alternately provided in the radial direction on the front side surface of the cover 30, and the front side surface of the cover 30 bulges toward the front side on the circle center 29 side compared to the outer peripheral edge 37 side. It is formed in a stepped shape. Thus, the strength of the cover 30 can be improved by alternately providing the concave portions 39 and the convex portions 38 along the radial direction.

  The rear side surface of the cover 30 is formed so that the circle center 29 side is recessed toward the front side (this portion is referred to as a recessed portion 42) compared with the outer peripheral edge 37 side, corresponding to the above-described front side surface. As shown in FIG. 6C, on the rear side surface of the cover 30, a rib (referred to as a first rib 40) that protrudes rearward and has a ring shape centered on the circle center 29, and an outer peripheral surface of the first rib 40 A plurality of (for example, six) ribs (referred to as second ribs 41) projecting toward the rear side while extending radially from the outer peripheral edge 37. The first rib 40 surrounds the screw hole 35 and the small hole 36 near the screw hole 35 from the outside in the radial direction. The hollow portion 42 is surrounded by a columnar space (referred to as a first space 43) surrounded by the first ribs 40, and a plurality (herein) surrounded by two adjacent second ribs 41, the first ribs 40, and the outer peripheral edge 37. Then, it is divided into six arc-shaped spaces (referred to as second spaces 44). Further, in the vicinity of the outer peripheral edge 37 on the rear side surface of the cover 30, a plurality of (for example, three) hooks 45 protruding rearward are provided at equal intervals in the circumferential direction.

  As shown in FIG. 5A, the cover 30 is fixed to the front side surface of the drum rear wall 18 by assembling a screw 46 passed through the screw hole 35 to the circular central portion 31 of the drum rear wall 18. At this time, the circle center (center axis 21) of the drum rear wall 18 and the circle center 29 of the cover 30 coincide with each other. A hook 45 (see FIG. 6C) is engaged with the drum rear wall 18, and the cover 30 is also fixed to the drum rear wall 18. In this state, as shown in FIG. 5A, the front side surface of the cover 30 faces the drum 8. Further, as shown in FIGS. 5A to 5C, the rear side surface of the cover 30 and the many small holes 36 face the receiving port 33 of the drum rear wall 18 from the front side. Thereby, the rear side of the drum rear wall 18 communicates with the inside of the drum 8 via the receiving port 33 and the small hole 36.

  By attaching this cover 30 to the front side surface of the drum rear wall 18, as shown in FIG. 3, the front side surface of the drum rear wall 18 has a stepped shape in which the central shaft 21 side bulges to the front side compared to the outer peripheral edge side. . That is, in the cover 30, the center (center shaft 21 side) bulges inward of the drum 8, and in this center (specifically, the first space 43 of the recessed portion 42 shown in FIG. 6C), the drum rear wall 18 and the motor A connecting portion (circular center portion 31 and shaft front end portion 15) with the shaft 14 can be disposed. On the other hand, as shown in FIG. 5A, in the cover 30, the periphery (outer peripheral edge 37 side) is close to the drum rear wall 18, so that even if the center bulges inward of the drum 8, A relatively large space for storing objects can be secured.

Then, as shown in FIG. 5B, the second rib 41 crosses the receiving port 33 radially from the center of the circle of the drum rear wall 18 outward (radially outward). Specifically, one second rib 41 crosses so as to divide the corresponding receiving port 33 into two.
Next, the positional relationship among the drum 8, the outer tub 7, and the air passage 5 will be described with reference to FIG.
In the state where the drum 8 is accommodated in the outer tub 7, as described above, the rear side surface of the drum rear wall 18 faces the front side surface of the outer tub rear wall 9 with a predetermined distance therebetween. Here, the front side surface of the outer tank rear wall 9 has a ring shape concentric with the outer tank rear wall 9 and protrudes forward (here, three) protrusions (referred to as the outer tank protrusion 47). Are provided at equal intervals in the radial direction. These outer tank protrusions 47 surround the inlet 27 in the outer tank rear wall 9 from the radially outer side. Here, the outer tank protrusion 47 and the drum protrusion 34 of the drum rear wall 18 are alternately arranged along the radial direction (referring to the radial direction of the outer tank 7 and the drum 8, the same applies hereinafter), A so-called labyrinth is constituted by the outer tank protrusion 47 and the drum protrusion 34.

Further, the inlet 27 is located at a position shifted outward from the receiving port 33 of the drum rear wall 18 in the radial direction.
Here, the drying air that has reached the case hole 50 from the air passage 5 (downstream air passage 26) during drying passes through the flow path 51 and the inlet 27 toward the radially inner side (the central axis 21 side of the drum 8). It passes through in order and is taken into the outer tub 7 (see the broken arrow in the figure). Since the inlet 27 is displaced outward with respect to the receiving port 33 as described above, this dry air continues to pass through the receiving port 33 and the small hole 36 of the cover 30 in order toward the inner side in the radial direction. 8 flows into the drum 8 toward the central axis 21 (see the broken arrow in the figure). As a result, in the drum 8, the laundry can be uniformly exposed to the drying air from the central shaft 21 side (also the motor shaft 14 side, see FIG. 3).

  Here, as shown in FIG. 3, the central shaft 21 (including the motor shaft 14) of the drum 8 extends obliquely upward toward the front, so that the laundry 52 accommodated in the drum 8 has its own weight. By this, the cover 30 is always contacted. However, since the concave portion 39 and the convex portion 38 are provided on the front side facing the drum 8 in the cover 30, a gap 53 can be secured between the cover 30 and the laundry 52. Accordingly, the small holes 36 (see FIG. 5C) of the cover 30 are prevented from being blocked by the laundry 52, and the dry air that has passed through the small holes 36 is smoothly supplied into the drum 8 from the gap 53 described above. As a result, the laundry 52 in the drum 8 can be effectively exposed to dry air.

Moreover, the recessed part 39 and the convex part 38 which were mentioned above are ring shapes centering on the central axis 21 (refer FIG. 5A). Therefore, even if the cover 30 rotates together with the drum 8, the convex portion 38 smoothly contacts the laundry 52, so that the laundry 52 can be prevented from being damaged.
In addition, referring to FIG. 4, the flow of the drying air from the receiving port 33 into the drum 8 is directly adjusted by the second rib 41 (see FIG. 5B). In particular, when the drum 8 is rotating, the drying air that has reached the receiving port 33 is moved by the second rib 41 that rotates together with the drum 8, and the second rib 41 that is located downstream of the second rib 41 in the rotation direction of the drum 8. 2 space 44 (see FIG. 6C). Thereby, the smooth inflow of the drying air from the small hole 36 communicating with the second space 44 into the drum 8 is promoted. As a result, it is possible to ensure a relatively large amount of drying air flowing into the drum 8 and to improve the drying efficiency of the laundry in the drum 8.

  Here, as described above, the labyrinth is constituted by the outer tank protrusion 47 and the drum protrusion 34. Therefore, even when the drum 8 is rotating, the dry air between the inlet 27 and the receiving port 33 does not go to the receiving port 33 and leaks to the outer side in the radial direction of the outer tank protrusion 47 and the drum protrusion 34. It is prevented from taking out. In order to supply dry air without leakage from the air passage 5 to the inlet 27, the joint portion 48 between the bearing case 16 and the air passage 5, and the bearing case 16 and the outer tub 7 (the outer tub rear wall 9) Confidentiality is ensured by providing packing and labyrinth at the joint 49.

  The present invention is not limited to the contents of the above embodiments, and various modifications can be made within the scope of the claims.

It is the perspective view which looked at the washing / drying machine 1 from the front upper right side, Comprising: The state which remove | eliminated some decorative panels which make the outer shell is shown. It is the perspective view which looked at the washing-drying machine 1 from which the decorative panel was removed partially from the back left upper side. It is right side sectional drawing of the washing dryer 1 from which the decorative panel was partially removed. FIG. 2 is a diagram showing a section around the rear upper end of the washing tub 3 in the washing / drying machine 1 in order to explain how the drying air flows from the air passage 5 into the drum 8. 3 is a right side sectional view of the drum 8. FIG. FIG. 6 is a rear view of the drum rear wall 18. 3 is a front view of a drum rear wall 18. FIG. It is a rear view of the drum rear wall 18 which concerns on a modification. 3 is a front view of a cover 30. FIG. It is sectional drawing based on the AA line of FIG. 6A. 3 is a rear perspective view of a cover 30. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing dryer 5 Air path 6 Heat pump apparatus 7 Outer tank 8 Drum 9 Outer tank rear wall 12 Motor 14 Motor shaft 18 Drum rear wall 19 Drum peripheral wall 27 Inlet 30 Cover 33 Receiving port 36 Small hole 38 Convex part 39 Concave part 41 Second rib

Claims (5)

An outer tank,
A circular drum rear wall disposed in the outer tub so as to be rotatable about a rotation shaft extending obliquely upward toward the front, and having a central portion connected in a direction orthogonal to the rotation shaft, and the drum rear wall A drum peripheral wall extending forward from the periphery, and a drum for storing laundry;
An intake opening formed in the rear wall of the drum;
A disk-shaped cover attached to the rear wall of the drum and formed with a plurality of small holes for allowing air flowing into the drum through the intake opening, and on the surface facing the drum, Covers in which ring-shaped concave portions and convex portions around the rotation axis are provided alternately along the radial direction around the rotation axis;
A drying air supply device for supplying drying air into the drum through the intake opening;
A dryer, comprising: The cover covers the intake opening from the inside of the drum, the center bulges inward of the drum, and the periphery is formed close to the drum rear wall,
The dryer according to claim 1, wherein a rib that protrudes toward the intake opening is provided on a surface facing the intake opening.   The dryer according to claim 2, wherein the ribs radially traverse the intake opening radially outward from the center.   The rear wall of the outer tub facing the rear wall of the drum is formed with an intake port for taking the dry air into the outer tub at a position shifted outward from the intake opening. The dryer according to any one of claims 1 to 3, wherein   A driving device for rotating the drum via the rotating shaft is provided on the rear surface of the rear wall of the outer tub and closer to the center than the intake port. Item 5. The dryer according to item 4.

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